It is a small, rocky island with an area of approximately 2.6 km2 (1.0 sq mi).

Akamaru's highest point rises to an elevation of 247 m (810 ft).

In 1834, the French missionary Honoré Laval celebrated the first Mass on the island.

People from Mangareva sometimes visit to maintain the church and pick oranges in season.

[2] The much smaller island of Mekiro is located just off (about 100 m) Akamaru's northwestern shore.